Absorption of lean SO2 in aqueous solutions of Na2CO3 and desorption of CO2

Dynamic measurement of liquid‐phase mass transfer coefficient and significance on the SO2 absorption rate

“…This liquid‐phase mass transfer coefficient for CO 2 in water is correlated to the liquid‐phase mass transfer coefficient for SO 2 in water using Equation …”

“… is calculated with a value of 6.631 × 10 −4 s −1 for O 2 absorption into Na 2 SO 3 at a pH of 8. If Equation is used again here, Equation is obtained . The molecular volume of O 2 is 0.0256 m 3 kgmole −1 .…”

“…Here, k L;CO 2 a is the liquid-phase volumetric mass transfer coefficient (s −1 ); t is time (s); [H 2 CO 3 ] i is carbonic acid concentration at the gas-liquid interface (kmol m −3 ); [H 2 CO 3 ] is carbonic acid concentration in the liquid bulk; and [HCO 3 − ]is concentration of bicarbonate ions (kmol m −3 ). In the above equation, carbonic acid (H 2 CO 3 ) is considered as the total amount of physically dissolved CO 2 and H 2 CO 3 .…”

“…If Equation (4) is used again here, Equation (20) is obtained. 3,8,32 The molecular volume of O 2 is 0.0256 m 3 kgmole −1 . 34 Solving Equation (20) gives the liquid-phase mass transfer coefficient for SO 2 in water as 2.961 × 10 −5 m s −1 .…”

Dynamic measurement of liquid‐phase mass transfer coefficient and significance on the SO2 absorption rate

“…This liquid‐phase mass transfer coefficient for CO 2 in water is correlated to the liquid‐phase mass transfer coefficient for SO 2 in water using Equation …”

“… is calculated with a value of 6.631 × 10 −4 s −1 for O 2 absorption into Na 2 SO 3 at a pH of 8. If Equation is used again here, Equation is obtained . The molecular volume of O 2 is 0.0256 m 3 kgmole −1 .…”

“…Here, k L;CO 2 a is the liquid-phase volumetric mass transfer coefficient (s −1 ); t is time (s); [H 2 CO 3 ] i is carbonic acid concentration at the gas-liquid interface (kmol m −3 ); [H 2 CO 3 ] is carbonic acid concentration in the liquid bulk; and [HCO 3 − ]is concentration of bicarbonate ions (kmol m −3 ). In the above equation, carbonic acid (H 2 CO 3 ) is considered as the total amount of physically dissolved CO 2 and H 2 CO 3 .…”

“…If Equation (4) is used again here, Equation (20) is obtained. 3,8,32 The molecular volume of O 2 is 0.0256 m 3 kgmole −1 . 34 Solving Equation (20) gives the liquid-phase mass transfer coefficient for SO 2 in water as 2.961 × 10 −5 m s −1 .…”

Remove Sulfur Dioxide from Flue Gases to Obtain Sulfuric Acid through Electrodialysis Enrichment

“…The reasons may be that SO 2 absorption process was controlled by the gas film, high concentrations of CO 2 in the mixture involved in chemical equilibrium process, thereby increasing SO 2 gas phase mass transfer resistance and impact absorption rate of SO 2 . [18][19][20] Oxygen in the air increased the oxidation to SO 2 and removal efficiency was enhanced, dilution of sulfur dioxide with air instead of nitrogen also reduced the energy consumption, therefore the removal efficiency from the mixture of SO 2 + air topped out. Initial SO 2 concentration.-Gas pollutant concentrations often change in dynamic range, so two different sulfur dioxide concentrations were investigated.…”

Dynamic measurement of liquid‐phase mass transfer coefficient and significance on the SO2 absorption rate

“…This liquid‐phase mass transfer coefficient for CO 2 in water is correlated to the liquid‐phase mass transfer coefficient for SO 2 in water using Equation …”

“… is calculated with a value of 6.631 × 10 −4 s −1 for O 2 absorption into Na 2 SO 3 at a pH of 8. If Equation is used again here, Equation is obtained . The molecular volume of O 2 is 0.0256 m 3 kgmole −1 .…”

“…Here, k L;CO 2 a is the liquid-phase volumetric mass transfer coefficient (s −1 ); t is time (s); [H 2 CO 3 ] i is carbonic acid concentration at the gas-liquid interface (kmol m −3 ); [H 2 CO 3 ] is carbonic acid concentration in the liquid bulk; and [HCO 3 − ]is concentration of bicarbonate ions (kmol m −3 ). In the above equation, carbonic acid (H 2 CO 3 ) is considered as the total amount of physically dissolved CO 2 and H 2 CO 3 .…”

“…If Equation (4) is used again here, Equation (20) is obtained. 3,8,32 The molecular volume of O 2 is 0.0256 m 3 kgmole −1 . 34 Solving Equation (20) gives the liquid-phase mass transfer coefficient for SO 2 in water as 2.961 × 10 −5 m s −1 .…”

Remove Sulfur Dioxide from Flue Gases to Obtain Sulfuric Acid through Electrodialysis Enrichment

“…The reasons may be that SO 2 absorption process was controlled by the gas film, high concentrations of CO 2 in the mixture involved in chemical equilibrium process, thereby increasing SO 2 gas phase mass transfer resistance and impact absorption rate of SO 2 . [18][19][20] Oxygen in the air increased the oxidation to SO 2 and removal efficiency was enhanced, dilution of sulfur dioxide with air instead of nitrogen also reduced the energy consumption, therefore the removal efficiency from the mixture of SO 2 + air topped out. Initial SO 2 concentration.-Gas pollutant concentrations often change in dynamic range, so two different sulfur dioxide concentrations were investigated.…”

Dynamic measurement of liquid‐phase mass transfer coefficient and significance on the SO2 absorption rate

“…This liquid‐phase mass transfer coefficient for CO 2 in water is correlated to the liquid‐phase mass transfer coefficient for SO 2 in water using Equation …”

“… is calculated with a value of 6.631 × 10 −4 s −1 for O 2 absorption into Na 2 SO 3 at a pH of 8. If Equation is used again here, Equation is obtained . The molecular volume of O 2 is 0.0256 m 3 kgmole −1 .…”

“…Here, k L;CO 2 a is the liquid-phase volumetric mass transfer coefficient (s −1 ); t is time (s); [H 2 CO 3 ] i is carbonic acid concentration at the gas-liquid interface (kmol m −3 ); [H 2 CO 3 ] is carbonic acid concentration in the liquid bulk; and [HCO 3 − ]is concentration of bicarbonate ions (kmol m −3 ). In the above equation, carbonic acid (H 2 CO 3 ) is considered as the total amount of physically dissolved CO 2 and H 2 CO 3 .…”

“…If Equation (4) is used again here, Equation (20) is obtained. 3,8,32 The molecular volume of O 2 is 0.0256 m 3 kgmole −1 . 34 Solving Equation (20) gives the liquid-phase mass transfer coefficient for SO 2 in water as 2.961 × 10 −5 m s −1 .…”

Remove Sulfur Dioxide from Flue Gases to Obtain Sulfuric Acid through Electrodialysis Enrichment

“…The reasons may be that SO 2 absorption process was controlled by the gas film, high concentrations of CO 2 in the mixture involved in chemical equilibrium process, thereby increasing SO 2 gas phase mass transfer resistance and impact absorption rate of SO 2 . [18][19][20] Oxygen in the air increased the oxidation to SO 2 and removal efficiency was enhanced, dilution of sulfur dioxide with air instead of nitrogen also reduced the energy consumption, therefore the removal efficiency from the mixture of SO 2 + air topped out. Initial SO 2 concentration.-Gas pollutant concentrations often change in dynamic range, so two different sulfur dioxide concentrations were investigated.…”